JP6792483B2 - Piping fittings and resin tube assemblies - Google Patents

Piping fittings and resin tube assemblies Download PDF

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Publication number
JP6792483B2
JP6792483B2 JP2017032423A JP2017032423A JP6792483B2 JP 6792483 B2 JP6792483 B2 JP 6792483B2 JP 2017032423 A JP2017032423 A JP 2017032423A JP 2017032423 A JP2017032423 A JP 2017032423A JP 6792483 B2 JP6792483 B2 JP 6792483B2
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housing
seal
resin tube
peripheral surface
pipe
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JP2018135996A (en
Inventor
史紀 大場
史紀 大場
右匡 鎌塚
右匡 鎌塚
俊杰 申
俊杰 申
将司 山口
将司 山口
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Sanoh Industrial Co Ltd
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Sanoh Industrial Co Ltd
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Priority to JP2017032423A priority Critical patent/JP6792483B2/en
Priority to DE112018000972.6T priority patent/DE112018000972T5/en
Priority to PCT/JP2018/004235 priority patent/WO2018155187A1/en
Priority to US16/487,805 priority patent/US11262006B2/en
Priority to CN201880013362.0A priority patent/CN110337558B/en
Publication of JP2018135996A publication Critical patent/JP2018135996A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
    • F16L33/30—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses comprising parts inside the hoses only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00—Joints with sleeve or socket
    • F16L21/02—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L37/00—Couplings of the quick-acting type
    • F16L37/02—Couplings of the quick-acting type in which the connection is maintained only by friction of the parts being joined
    • F16L37/04—Couplings of the quick-acting type in which the connection is maintained only by friction of the parts being joined with an elastic outer part pressing against an inner part by reason of its elasticity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L37/00—Couplings of the quick-acting type
    • F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
    • F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L17/00—Joints with packing adapted to sealing by fluid pressure
    • F16L17/02—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00—Joints with sleeve or socket
    • F16L21/08—Joints with sleeve or socket with additional locking means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L2201/00—Special arrangements for pipe couplings
    • F16L2201/10—Indicators for correct coupling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L37/00—Couplings of the quick-acting type
    • F16L37/02—Couplings of the quick-acting type in which the connection is maintained only by friction of the parts being joined
    • F16L37/04—Couplings of the quick-acting type in which the connection is maintained only by friction of the parts being joined with an elastic outer part pressing against an inner part by reason of its elasticity
    • F16L37/05—Couplings of the quick-acting type in which the connection is maintained only by friction of the parts being joined with an elastic outer part pressing against an inner part by reason of its elasticity tightened by the pressure of a mechanical element

Description

本発明は、先端部の外周面に凸部が形成された接続パイプに樹脂チューブを接続する配管継手及び当該配管継手を備える樹脂チューブ組立体に関する。 The present invention relates to a pipe joint for connecting a resin tube to a connection pipe having a convex portion formed on the outer peripheral surface of the tip portion, and a resin tube assembly including the pipe joint.

従来の自動車用冷却回路等では、先端部の外周面に凸部が形成された接続パイプに、ゴムホース等の可撓性を有する可撓ホースを接続していた（例えば、特許文献１参照）。この凸部は、バルジ形状、カール形状等とも呼ばれ、接続パイプに対する可撓ホースの抜け止めを行うとともに、可撓ホースとの間のシール性を確保する機能を有する。 In a conventional cooling circuit for an automobile or the like, a flexible hose such as a rubber hose is connected to a connecting pipe having a convex portion formed on the outer peripheral surface of the tip portion (see, for example, Patent Document 1). This convex portion is also called a bulge shape, a curl shape, or the like, and has a function of preventing the flexible hose from coming off from the connecting pipe and ensuring a sealing property between the flexible hose and the flexible hose.

近年、自動車等の軽量化の要請から、可撓ホースの代わりに、より軽量な樹脂チューブを用いることが考えられている。しかしながら、軽量化を図ることのできる樹脂チューブは、ゴムホースのような可撓性を有しないため、そのまま接続パイプに嵌め込むことができない。 In recent years, due to the demand for weight reduction of automobiles and the like, it has been considered to use a lighter resin tube instead of a flexible hose. However, since the resin tube that can be reduced in weight does not have flexibility like a rubber hose, it cannot be fitted into the connecting pipe as it is.

そこで、特許文献２では、リテーナ―を用いた配管継手が提案されている。この配管継手では、接続パイプの中央部の外周面に係合突起を形成し、この係合突起に、樹脂チューブが接続された配管継手のリテーナを係合することで、接続パイプに対して樹脂チューブを接続する。 Therefore, Patent Document 2 proposes a pipe joint using a retainer. In this pipe joint, an engaging protrusion is formed on the outer peripheral surface of the central portion of the connecting pipe, and the retainer of the pipe joint to which the resin tube is connected is engaged with the engaging protrusion to form a resin with respect to the connecting pipe. Connect the tubes.

特開２０００−３５２４９２号公報Japanese Unexamined Patent Publication No. 2000-352492 特開平０９−３２９２８４号公報Japanese Unexamined Patent Publication No. 09-329284

しかしながら、特許文献２に記載された配管継手では、接続パイプの形状が、可撓ホースを接続するための接続パイプの形状と異なる。このため、配管を可撓ホースから樹脂チューブに置換する際に、配管のみならず、接続パイプも仕様変更する必要がある。 However, in the pipe joint described in Patent Document 2, the shape of the connecting pipe is different from the shape of the connecting pipe for connecting the flexible hose. Therefore, when replacing the flexible hose with a resin tube, it is necessary to change the specifications of not only the pipe but also the connecting pipe.

そこで、本発明は、可撓ホースを接続するための接続パイプにも樹脂チューブを接続することができる配管継手及び樹脂チューブ組立体を提供することを目的とする。 Therefore, an object of the present invention is to provide a pipe joint and a resin tube assembly capable of connecting a resin tube to a connection pipe for connecting a flexible hose.

本発明に係る配管継手は、先端部の外周面に凸部が形成された接続パイプに樹脂チューブを接続する配管継手であって、樹脂チューブが圧入されるハウジングと、接続パイプが挿入されて接続パイプとの間をシールする弾性伸縮可能なシール部材と、を備え、ハウジングは、一方端部に位置して外周面側に樹脂チューブが圧入される第一ハウジング部と、他方端部に位置する第二ハウジング部と、を有し、シール部材は、第二ハウジング部の内周面側に挿入される第一シール部を有する。 The piping joint according to the present invention is a piping joint for connecting a resin tube to a connecting pipe having a convex portion formed on the outer peripheral surface of the tip portion, and is connected to a housing into which the resin tube is press-fitted by inserting the connecting pipe. It is provided with an elastically stretchable sealing member that seals between the pipes, and the housing is located at one end and at the first housing where the resin tube is press-fitted to the outer peripheral surface side and at the other end. It has a second housing portion, and the sealing member has a first sealing portion that is inserted into the inner peripheral surface side of the second housing portion.

この配管継手では、弾性伸縮可能なシール部材を備えるため、可撓ホースを接続するための接続パイプをシール部材に挿入することができる。そして、ハウジングの第一ハウジング部に樹脂チューブを圧入するとともに、シール部材に接続パイプを挿入することで、配管継手により接続パイプと樹脂チューブとを接続することができる。しかも、第一シール部が第二ハウジング部の内周面側に挿入されているため、接続パイプを第一シール部の内周面側に挿入すると、第一シール部が接続パイプの凸部と第二ハウジング部とに挟み込まれて押圧された状態となる。これにより、第一シール部及び第二ハウジングと接続パイプとの間のシール性を高めることができる。 Since this pipe joint includes a seal member that can be elastically expanded and contracted, a connecting pipe for connecting a flexible hose can be inserted into the seal member. Then, by press-fitting the resin tube into the first housing portion of the housing and inserting the connecting pipe into the seal member, the connecting pipe and the resin tube can be connected by the pipe joint. Moreover, since the first seal portion is inserted on the inner peripheral surface side of the second housing portion, when the connection pipe is inserted on the inner peripheral surface side of the first seal portion, the first seal portion becomes a convex portion of the connection pipe. It is in a state of being sandwiched between the second housing portion and pressed. Thereby, the sealing property between the first sealing portion and the second housing and the connecting pipe can be improved.

シール部材を締め付けるシールバンドを更に備え、シール部材は、ハウジングから突出してシールバンドに締め付けられる第二シール部を有してもよい。この配管継手では、ハウジングから突出する第二シール部がシールバンドにより締め付けられるため、シール部材を接続パイプに押圧することができる。これにより、シール部材と接続パイプとの接続強度を向上することができるともに、シール部材と接続パイプとの間のシール性を向上することができる。このため、例えば、配管内を流れる流体の圧力が高く、接続パイプの凸部と第一ハウジング部とにより第一シール部を挟み込む力では接続パイプと第一シール部との間のシール性が不足する場合等に、特に効果を発揮する。 A seal band for tightening the seal member may be further provided, and the seal member may have a second seal portion that protrudes from the housing and is fastened to the seal band. In this pipe joint, since the second seal portion protruding from the housing is tightened by the seal band, the seal member can be pressed against the connecting pipe. As a result, the connection strength between the seal member and the connection pipe can be improved, and the sealability between the seal member and the connection pipe can be improved. For this reason, for example, the pressure of the fluid flowing in the pipe is high, and the force of sandwiching the first seal portion between the convex portion of the connecting pipe and the first housing portion lacks the sealing property between the connecting pipe and the first seal portion. It is especially effective when doing so.

第二ハウジング部の内周面又は第一シール部の外周面の何れか一方には、凹部が形成されており、第二ハウジング部の内周面又は第一シール部の外周面の何れか他方には、凹部に嵌め込まれる凸部が形成されていてもよい。この配管継手では、第二ハウジング部の内周面又は第一シール部の外周面の何れか一方に形成された凹部に、第二ハウジング部の内周面又は第一シール部の外周面の何れか他方に形成された凸部が嵌め込まれることで、ハウジングに対してシール部材が脱落するのを抑制することができる。 A recess is formed on either the inner peripheral surface of the second housing portion or the outer peripheral surface of the first seal portion, and either the inner peripheral surface of the second housing portion or the outer peripheral surface of the first seal portion is formed. May be formed with a convex portion to be fitted into the concave portion. In this pipe joint, either the inner peripheral surface of the second housing portion or the outer peripheral surface of the first seal portion is formed in a recess formed on either the inner peripheral surface of the second housing portion or the outer peripheral surface of the first seal portion. By fitting the convex portion formed on the other side, it is possible to prevent the seal member from falling off from the housing.

ハウジングとシール部材とは、一体的に成形されていてもよい。この配管継手では、ハウジングとシール部材とが一体的に形成されているため、ハウジングからシール部材が脱落するのを抑制することができるとともに、ハウジングの第二ハウジング部とシール部材の第一シール部との間のシール性を向上することができる。 The housing and the sealing member may be integrally molded. In this pipe joint, since the housing and the seal member are integrally formed, it is possible to prevent the seal member from falling off from the housing, and the second housing portion of the housing and the first seal portion of the seal member can be prevented. It is possible to improve the sealing property between and.

ハウジングとシール部材とは、別部材であってもよい。この配管継手では、ハウジングとシール部材とが別部材であるため、容易に製造することができる。この場合、例えば、第二ハウジング部の内周面と第一シール部の外周面とに互いに嵌合する凹凸を形成すること、第二ハウジング部４２に第一シール部５１を圧入すること等により、ハウジングに対してシール部材が脱落するのを抑制することができる。 The housing and the seal member may be separate members. Since the housing and the seal member are separate members of this pipe joint, it can be easily manufactured. In this case, for example, by forming irregularities that fit each other on the inner peripheral surface of the second housing portion and the outer peripheral surface of the first seal portion, or by press-fitting the first seal portion 51 into the second housing portion 42. , It is possible to prevent the seal member from falling off from the housing.

本発明に係る樹脂チューブ組立体は、樹脂チューブと、上記の配管継手と、を備え、第一ハウジング部が樹脂チューブに圧入されている。この樹脂チューブ組立体では、上記の配管継手の第一ハウジング部が樹脂チューブに圧入されているため、可撓ホースを接続するための接続パイプをシール部材に挿入することで、当該接続パイプにも樹脂チューブを接続することができる。 The resin tube assembly according to the present invention includes a resin tube and the above-mentioned piping joint, and the first housing portion is press-fitted into the resin tube. In this resin tube assembly, since the first housing portion of the above pipe joint is press-fitted into the resin tube, by inserting the connecting pipe for connecting the flexible hose into the sealing member, the connecting pipe can also be used. A resin tube can be connected.

本発明によれば、可撓ホースを接続するための接続パイプにも樹脂チューブを接続することができる。 According to the present invention, the resin tube can also be connected to the connecting pipe for connecting the flexible hose.

本実施形態の樹脂チューブ組立体を接続パイプに接続する状態を示す斜視図である。It is a perspective view which shows the state which connects the resin tube assembly of this embodiment to a connection pipe. 樹脂チューブ組立体と接続パイプとの接続部分を示す斜視図である。It is a perspective view which shows the connection part of a resin tube assembly and a connection pipe. 樹脂チューブ組立体と接続パイプとの接続部分を示す断面図である。It is sectional drawing which shows the connection part of a resin tube assembly and a connection pipe. 本実施形態の配管継手を示す斜視図である。It is a perspective view which shows the piping joint of this embodiment. 本実施形態の配管継手を示す断面図である。It is sectional drawing which shows the piping joint of this embodiment. 本実施形態の配管継手を示す分解斜視図である。It is an exploded perspective view which shows the piping joint of this embodiment. 樹脂チューブ組立体を接続パイプに接続した状態を示す断面図である。It is sectional drawing which shows the state which connected the resin tube assembly to the connection pipe. 変形例の配管継手を示す分解斜視図である。It is an exploded perspective view which shows the pipe joint of the modification. 変形例の配管継手を示す分解斜視図である。It is an exploded perspective view which shows the pipe joint of the modification.

以下、図面を参照して、実施形態に係る配管継手及び樹脂チューブ組立体を説明する。本実施形態は、なお、各図において同一又は相当する要素については同一の符号を付し、重複する説明を省略する。 Hereinafter, the piping joint and the resin tube assembly according to the embodiment will be described with reference to the drawings. In the present embodiment, the same or corresponding elements are designated by the same reference numerals in the respective drawings, and duplicate description will be omitted.

図１〜図３に示すように、本実施形態に係る配管継手１は、樹脂チューブ２を接続パイプ３に接続するための継手である。配管継手１と樹脂チューブ２とは、樹脂チューブ組立体１０を構成する。 As shown in FIGS. 1 to 3, the pipe joint 1 according to the present embodiment is a joint for connecting the resin tube 2 to the connecting pipe 3. The pipe joint 1 and the resin tube 2 form a resin tube assembly 10.

樹脂チューブ２は、軽量化を図るためにゴムホース等の可撓性を有する可撓ホースの代替品として用いられるものである。樹脂チューブ２は、可撓ホースよりも軽量な樹脂により形成されている。樹脂チューブ２を形成する樹脂としては、特に限定されないが、軽量化の観点から、例えば、ポリアミド系樹脂やポリフェニレンサルファイド樹脂等を用いることができる。 The resin tube 2 is used as a substitute for a flexible flexible hose such as a rubber hose in order to reduce the weight. The resin tube 2 is made of a resin that is lighter than the flexible hose. The resin forming the resin tube 2 is not particularly limited, but from the viewpoint of weight reduction, for example, a polyamide resin, a polyphenylene sulfide resin, or the like can be used.

接続パイプ３は、可撓ホースを接続するために用いられるパイプである。接続パイプ３は、通常、金属からなるが、樹脂等の金属以外の素材からなってもよい。接続パイプ３は、円筒状に延びている。接続パイプ３は、その先端部の外周面に形成される凸部３１を備える。凸部３１は、接続パイプ３の全周に亘るリング状に形成されている。凸部３１の断面形状は、特に限定されないが、例えば、先端に向かうに従い細くなるテーパ形状（バルジ形状）、円形（カール形状）等とすることができる。必要に応じて、接続パイプ３の凸部３１よりも基端側の外周面に凸部３２（スプール）を設けてもよい。接続パイプ３の先端部とは、接続パイプ３の先端だけでなく、当該先端の付近を含む意味である。このため、凸部３１は、接続パイプ３の先端付近であれば、接続パイプ３の先端から少し基端側の位置に形成されていてもよい。接続パイプ３の基端側とは、接続パイプ３の先端とは反対側をいう。 The connecting pipe 3 is a pipe used for connecting a flexible hose. The connecting pipe 3 is usually made of metal, but may be made of a material other than metal such as resin. The connecting pipe 3 extends in a cylindrical shape. The connecting pipe 3 includes a convex portion 31 formed on the outer peripheral surface of the tip portion thereof. The convex portion 31 is formed in a ring shape over the entire circumference of the connecting pipe 3. The cross-sectional shape of the convex portion 31 is not particularly limited, but may be, for example, a tapered shape (bulge shape), a circular shape (curl shape), or the like that becomes thinner toward the tip. If necessary, the convex portion 32 (spool) may be provided on the outer peripheral surface of the connecting pipe 3 on the proximal end side of the convex portion 31. The tip of the connecting pipe 3 means not only the tip of the connecting pipe 3 but also the vicinity of the tip. Therefore, the convex portion 31 may be formed at a position slightly closer to the base end side from the tip end of the connection pipe 3 as long as it is near the tip end of the connection pipe 3. The base end side of the connecting pipe 3 means the side opposite to the tip end of the connecting pipe 3.

図１〜図６に示すように、配管継手１は、ハウジング４と、シール部材５と、シールバンド６と、を備える。 As shown in FIGS. 1 to 6, the pipe joint 1 includes a housing 4, a seal member 5, and a seal band 6.

ハウジング４は、樹脂チューブが圧入される。ハウジング４は、常温では可撓性を有しない材料により形成されている。ハウジング４の材料としては、特に限定されないが、強度の観点から、例えば、ポリアミド系樹脂やポリフェニレンサルファイド樹脂にグラスファイバーを配合した強化樹脂等を用いることができる。ハウジング４は、略円筒状に形成されている。ハウジング４は、第一ハウジング部４１と、第二ハウジング部４２と、を備える。 A resin tube is press-fitted into the housing 4. The housing 4 is made of a material that is not flexible at room temperature. The material of the housing 4 is not particularly limited, but from the viewpoint of strength, for example, a polyamide resin, a reinforced resin in which glass fiber is mixed with polyphenylene sulfide resin, or the like can be used. The housing 4 is formed in a substantially cylindrical shape. The housing 4 includes a first housing portion 41 and a second housing portion 42.

第一ハウジング部４１は、ハウジング４の一方端部に位置して、外周面側に樹脂チューブ２が圧入される部位である。第一ハウジング部４１の外周面は、樹脂チューブ２の抜け止めを行うとともに、樹脂チューブ２との間のシール性を確保するために、凹凸形状に形成されている。第一ハウジング部４１の外周面の最大径は、樹脂チューブ２の内径よりも大きい。必要に応じて、第一ハウジング部４１の外周面に円周状の溝４３を形成し、溝４３に樹脂チューブ２との間のシール性を向上させるためのＯリング７を嵌め込んでもよい。この場合、Ｏリング７は、ゴム等の弾性伸縮する弾性部材で構成されているものを用いる。 The first housing portion 41 is located at one end of the housing 4 and is a portion where the resin tube 2 is press-fitted to the outer peripheral surface side. The outer peripheral surface of the first housing portion 41 is formed in an uneven shape in order to prevent the resin tube 2 from coming off and to secure a sealing property with the resin tube 2. The maximum diameter of the outer peripheral surface of the first housing portion 41 is larger than the inner diameter of the resin tube 2. If necessary, a circumferential groove 43 may be formed on the outer peripheral surface of the first housing portion 41, and an O-ring 7 for improving the sealing property with the resin tube 2 may be fitted in the groove 43. In this case, the O-ring 7 is made of an elastic member such as rubber that expands and contracts elastically.

第二ハウジング部４２は、ハウジング４の他方端部に位置して、シール部材５が挿入される部位である。ハウジング４の他方端部とは、第一ハウジング部４１が形成されるハウジング４の一方端部とは反対側の端部をいう。 The second housing portion 42 is located at the other end of the housing 4 and is a portion into which the seal member 5 is inserted. The other end of the housing 4 means the end of the housing 4 on which the first housing portion 41 is formed, which is opposite to the one end of the housing 4.

第二ハウジング部４２の内径と第一ハウジング部４１の内径とは、何れが大きくてもよく、同じであってもよい。第二ハウジング部４２の内径が第一ハウジング部４１の内径よりも大きい場合は、第一ハウジング部４１の内周面と第二ハウジング部４２の内周面との間に、段差面４４が形成される。段差面４４は、シール部材５に挿入された接続パイプ３の先端部を当接させる面である。段差面４４は、ハウジング４の軸線方向と直交する方向に延びて、ハウジング４の軸線方向を向く。第二ハウジング部４２の内径が第一ハウジング部４１の内径よりも小さい場合、又は第二ハウジング部４２の内径と第一ハウジング部４１の内径とが同じ場合、ハウジング４の内周面に、接続パイプ３の先端部を当接させるリブ（図示せず）を形成してもよい。 The inner diameter of the second housing portion 42 and the inner diameter of the first housing portion 41 may be larger or the same. When the inner diameter of the second housing portion 42 is larger than the inner diameter of the first housing portion 41, a stepped surface 44 is formed between the inner peripheral surface of the first housing portion 41 and the inner peripheral surface of the second housing portion 42. Will be done. The stepped surface 44 is a surface that abuts the tip of the connecting pipe 3 inserted into the seal member 5. The step surface 44 extends in a direction orthogonal to the axial direction of the housing 4 and faces the axial direction of the housing 4. If the inner diameter of the second housing portion 42 is smaller than the inner diameter of the first housing portion 41, or if the inner diameter of the second housing portion 42 and the inner diameter of the first housing portion 41 are the same, the connection is made to the inner peripheral surface of the housing 4. A rib (not shown) that abuts the tip of the pipe 3 may be formed.

第二ハウジング部４２の内周面には、凹部４５が形成されている。凹部４５は、後述するシール部材５の凸部５３が嵌め込まれる部位である。凹部４５は、第二ハウジング部４２の内周面の全周に亘るリング状に形成されている。凹部４５の凹形状としては、特に限定されないが、例えば、円形状、楕円形状、三角形状、四角形状等とすることができる。ハウジング４の軸線方向における凹部４５の形成位置は、特に限定されないが、例えば、段差面４４に隣接した位置、段差面４４の近傍等とすることができる。 A recess 45 is formed on the inner peripheral surface of the second housing portion 42. The concave portion 45 is a portion into which the convex portion 53 of the seal member 5, which will be described later, is fitted. The recess 45 is formed in a ring shape over the entire inner peripheral surface of the second housing portion 42. The concave shape of the concave portion 45 is not particularly limited, but may be, for example, a circular shape, an elliptical shape, a triangular shape, a square shape, or the like. The position where the recess 45 is formed in the axial direction of the housing 4 is not particularly limited, but may be, for example, a position adjacent to the step surface 44, a position near the step surface 44, or the like.

シール部材５は、接続パイプ３が挿入されて、挿入された接続パイプ３との間をシールする。シール部材５は、弾性伸縮可能な材料により形成されている。シール部材５を形成する素材としては、特に限定されないが、弾性伸縮性及びシール性の観点から、例えば、エチレンプロピレンゴム、フッ素ゴム、フロロシリコンゴム、水素化ニトリルゴム等を用いることができる。ハウジング４は、略円筒状に形成されている。シール部材５は、第一シール部５１と、第二シール部５２と、を備える。 The sealing member 5 is inserted with the connecting pipe 3 and seals between the sealing member 5 and the inserted connecting pipe 3. The seal member 5 is made of an elastically stretchable material. The material for forming the sealing member 5 is not particularly limited, but from the viewpoint of elastic elasticity and sealing property, for example, ethylene propylene rubber, fluororubber, fluorosilicone rubber, hydrogenated nitrile rubber and the like can be used. The housing 4 is formed in a substantially cylindrical shape. The seal member 5 includes a first seal portion 51 and a second seal portion 52.

第一シール部５１は、第二ハウジング部４２の内周面側に挿入される部位である。第二ハウジング部４２の内径が第一ハウジング部４１の内径よりも大きい場合は、接続パイプ３の先端部を当接させる段差面４４に第一シール部５１の先端が当接される。そして、段差面４４に接続パイプ３の先端部が当接されるように、段差面４４が第一シール部５１よりも内側まで延びている。第一シール部５１の内径が第一ハウジング部４１の内径よりも小さい場合は、接続パイプ３の先端部を当接させるリブ（図示せず）に、第一シール部５１の先端が当接される。そして、リブに接続パイプ３の先端部が当接されるように、リブが第一シール部５１よりも内側まで延びている。 The first seal portion 51 is a portion to be inserted into the inner peripheral surface side of the second housing portion 42. When the inner diameter of the second housing portion 42 is larger than the inner diameter of the first housing portion 41, the tip of the first seal portion 51 is brought into contact with the stepped surface 44 that comes into contact with the tip of the connecting pipe 3. Then, the stepped surface 44 extends inward from the first seal portion 51 so that the tip end portion of the connecting pipe 3 comes into contact with the stepped surface 44. When the inner diameter of the first seal portion 51 is smaller than the inner diameter of the first housing portion 41, the tip of the first seal portion 51 is brought into contact with a rib (not shown) that abuts the tip of the connection pipe 3. To. Then, the rib extends inward from the first seal portion 51 so that the tip end portion of the connecting pipe 3 comes into contact with the rib.

第一シール部５１の外周面には、凹部４５に嵌め込まれる凸部５３が形成されている。凸部５３は、凹部４５に対応する位置及び形状に形成されている。凸部５３は、凹部４５に嵌め込まれることで、ハウジング４の軸線方向において、ハウジング４に対してシール部材５を係止する。このため、凸部５３は、ハウジング４からシール部材５が抜けるのを抑制する機能を有する。 A convex portion 53 fitted into the concave portion 45 is formed on the outer peripheral surface of the first seal portion 51. The convex portion 53 is formed at a position and shape corresponding to the concave portion 45. The convex portion 53 is fitted into the concave portion 45 to lock the seal member 5 to the housing 4 in the axial direction of the housing 4. Therefore, the convex portion 53 has a function of suppressing the sealing member 5 from coming off from the housing 4.

第二シール部５２は、ハウジング４から突出してシールバンド６に締め付けられる部位である。第二シール部５２の内径は、第一シール部５１の内径と同じである。このため、シール部材５に接続パイプ３を容易に挿入することができるとともに、シール部材５に挿入された接続パイプ３の全体をシール部材５に密着させることができる。第二シール部５２の外径は、第一シール部５１の外径よりも大きい。このため、締め代により狭まるシールバンド６の内径に対し、第二シール部５２の外形を適正な締め代となるよう設定することにより、安定した締付け力が得られる。 The second seal portion 52 is a portion that protrudes from the housing 4 and is fastened to the seal band 6. The inner diameter of the second seal portion 52 is the same as the inner diameter of the first seal portion 51. Therefore, the connection pipe 3 can be easily inserted into the seal member 5, and the entire connection pipe 3 inserted into the seal member 5 can be brought into close contact with the seal member 5. The outer diameter of the second seal portion 52 is larger than the outer diameter of the first seal portion 51. Therefore, a stable tightening force can be obtained by setting the outer shape of the second seal portion 52 to have an appropriate tightening allowance with respect to the inner diameter of the seal band 6 narrowed by the tightening allowance.

ハウジング４とシール部材５とは、一体的に形成されている。つまり、ハウジング４とシール部材５とは、第二ハウジング部４２の内周面と第一シール部５１の外周面とが密着した状態で分離不能な一つのユニットとして構成されている。このため、ハウジング４とシール部材５との間は、シールされた状態が保持されている。ハウジング４及びシール部材５は、例えば、二色成形により、一体的に形成することができる。但し、二色成形以外の製法により、ハウジング４とシール部材５とを一体的に形成してもよい。 The housing 4 and the seal member 5 are integrally formed. That is, the housing 4 and the seal member 5 are configured as one unit that cannot be separated in a state where the inner peripheral surface of the second housing portion 42 and the outer peripheral surface of the first seal portion 51 are in close contact with each other. Therefore, the sealed state is maintained between the housing 4 and the sealing member 5. The housing 4 and the seal member 5 can be integrally formed, for example, by two-color molding. However, the housing 4 and the seal member 5 may be integrally formed by a manufacturing method other than the two-color molding.

シールバンド６は、シール部材５の第二シール部５２を締め付ける。シールバンド６は、第二シール部５２を締め付けることで、シール部材５に挿入された接続パイプ３に第二シール部５２を圧接する。シールバンド６としては、公知の様々なシールバンドを用いることができ、例えば、ゴムホースを接続パイプ３に締め付けるシールバンドを用いることができる。この場合、シールバンド６は、締め付け力が高まる観点から、金属製の締結バンドであることが好ましい。金属製の締結バンドは、例えば、両端に摘まみが取り付けられた円形の弾性バネであり、摘まみを挟むと締め付け力が弱まり、摘まみを離すと締め付け力が高まる。 The seal band 6 tightens the second seal portion 52 of the seal member 5. By tightening the second seal portion 52, the seal band 6 presses the second seal portion 52 against the connecting pipe 3 inserted into the seal member 5. As the seal band 6, various known seal bands can be used. For example, a seal band that tightens a rubber hose to the connecting pipe 3 can be used. In this case, the seal band 6 is preferably a metal fastening band from the viewpoint of increasing the tightening force. The metal fastening band is, for example, a circular elastic spring having knobs attached to both ends. When the knobs are sandwiched, the tightening force is weakened, and when the knobs are released, the tightening force is increased.

配管継手１は、第一ハウジング部４１に樹脂チューブ２が圧入された樹脂チューブ組立体１０として構成されている。樹脂チューブ組立体１０は、樹脂チューブ２の一方端部にのみ配管継手１が圧入されたものであってもよく、樹脂チューブ２の両端部に配管継手１が圧入されたものであってもよい。 The pipe joint 1 is configured as a resin tube assembly 10 in which the resin tube 2 is press-fitted into the first housing portion 41. The resin tube assembly 10 may have the pipe joint 1 press-fitted only into one end of the resin tube 2, or the pipe joint 1 may be press-fitted into both ends of the resin tube 2. ..

このように構成される配管継手１及び樹脂チューブ組立体１０では、弾性伸縮可能なシール部材５を備えるため、図７に示すように、可撓ホースを接続するための接続パイプ３をシール部材５に挿入することができる。そして、ハウジング４の第一ハウジング部４１に樹脂チューブ２が圧入されているため、シール部材５に接続パイプ３を挿入することで、配管継手１により接続パイプ３と樹脂チューブ２とを接続することができる。 Since the pipe joint 1 and the resin tube assembly 10 configured in this way include the elastically expandable and contractible seal member 5, as shown in FIG. 7, the connection pipe 3 for connecting the flexible hose is the seal member 5. Can be inserted into. Since the resin tube 2 is press-fitted into the first housing portion 41 of the housing 4, the connection pipe 3 and the resin tube 2 are connected by the pipe joint 1 by inserting the connection pipe 3 into the seal member 5. Can be done.

しかも、第一シール部５１が第二ハウジング部４２の内周面側に挿入されているため、接続パイプ３を第一シール部５１の内周面側に挿入すると、第一シール部５１が接続パイプ３の凸部３１と第二ハウジング部４２とに挟み込まれて押圧された状態となる。これにより、第一シール部５１及び第二ハウジング部４２と接続パイプ３との間のシール性を高めることができる。 Moreover, since the first seal portion 51 is inserted into the inner peripheral surface side of the second housing portion 42, when the connection pipe 3 is inserted into the inner peripheral surface side of the first seal portion 51, the first seal portion 51 is connected. It is in a state of being sandwiched and pressed between the convex portion 31 of the pipe 3 and the second housing portion 42. As a result, the sealing property between the first sealing portion 51 and the second housing portion 42 and the connecting pipe 3 can be improved.

また、ハウジング４から突出する第二シール部５２がシールバンド６により締め付けられるため、シール部材５を接続パイプ３に押圧することができる。これにより、シール部材５と接続パイプ３との接続強度を向上することができるともに、シール部材５と接続パイプ３との間のシール性を向上することができる。このため、例えば、配管内を流れる流体の圧力が高く、接続パイプ３の凸部３１と第二ハウジング部４２とにより第一シール部５１を挟み込む力では接続パイプ３と第一シール部５１との間のシール性が不足する場合等に、特に効果を発揮する。 Further, since the second seal portion 52 protruding from the housing 4 is tightened by the seal band 6, the seal member 5 can be pressed against the connecting pipe 3. As a result, the connection strength between the seal member 5 and the connection pipe 3 can be improved, and the sealability between the seal member 5 and the connection pipe 3 can be improved. Therefore, for example, the pressure of the fluid flowing in the pipe is high, and the force of sandwiching the first seal portion 51 between the convex portion 31 of the connection pipe 3 and the second housing portion 42 causes the connection pipe 3 and the first seal portion 51 to hold each other. It is especially effective when the sealing property between the spaces is insufficient.

また、第二ハウジング部４２の内周面に形成された凹部４５に、第一シール部５１の外周面に形成された凸部５３が嵌め込まれることで、ハウジング４に対してシール部材５が脱落するのを抑制することができる。 Further, the sealing member 5 falls off from the housing 4 by fitting the convex portion 53 formed on the outer peripheral surface of the first sealing portion 51 into the concave portion 45 formed on the inner peripheral surface of the second housing portion 42. Can be suppressed.

また、ハウジング４とシール部材５とが一体的に形成されているため、ハウジング４からシール部材５が脱落するのを抑制することができるとともに、ハウジング４の第二ハウジング部４２とシール部材５の第一シール部５１との間のシール性を向上することができる。 Further, since the housing 4 and the seal member 5 are integrally formed, it is possible to prevent the seal member 5 from falling off from the housing 4, and the second housing portion 42 of the housing 4 and the seal member 5 The sealing property with the first sealing portion 51 can be improved.

以上、本発明の好適な実施形態について説明したが、本発明は上記実施形態に限定されるものではない。 Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.

例えば、上記実施形態では、ハウジング４とシール部材５とは一体的に形成されているものとして説明した。しかしながら、図８に示す配管継手１Ａのように、ハウジング４とシール部材５とは別部材であってもよい。この配管継手１Ａでは、ハウジング４とシール部材５とが別部材であるため、容易に製造することができる。この場合、第二ハウジング部４２の内周面に形成された凹部４５に第一シール部５１の外周面に形成された凸部５３を嵌め込むことで（図７参照）、ハウジング４に対してシール部材５が脱落するのを抑制することができる。このような凹部４５及び凸部５３を設けない場合であっても、例えば、第二ハウジング部４２に第一シール部５１を圧入することで、ハウジング４に対してシール部材５が脱落するのを抑制することができる。必要に応じて、第二ハウジング部４２の内面とシール部材５を接着剤で固着させることで、その効果は更に向上する。 For example, in the above embodiment, the housing 4 and the seal member 5 have been described as being integrally formed. However, as in the pipe joint 1A shown in FIG. 8, the housing 4 and the seal member 5 may be separate members. In this pipe joint 1A, since the housing 4 and the seal member 5 are separate members, they can be easily manufactured. In this case, by fitting the convex portion 53 formed on the outer peripheral surface of the first seal portion 51 into the concave portion 45 formed on the inner peripheral surface of the second housing portion 42 (see FIG. 7), the housing 4 is fitted. It is possible to prevent the seal member 5 from falling off. Even when such a concave portion 45 and a convex portion 53 are not provided, for example, by press-fitting the first seal portion 51 into the second housing portion 42, the seal member 5 can be prevented from falling off from the housing 4. It can be suppressed. If necessary, the inner surface of the second housing portion 42 and the sealing member 5 are fixed with an adhesive to further improve the effect.

また、上記実施形態では、シール部材５が第一シール部５１と第二シール部５２とを備えるものとして説明した。しかしながら、配管内部の内圧差が低い、もしくは負圧といった環境下で使用する場合は、図９に示す配管継手１Ｂのように、シール部材５Ｂは第一シール部５１のみを備えるものとしてもよい。この場合、シールバンドは不要となる。このような場合であっても、シール部材５Ｂの弾性伸縮力、接続パイプ３の凸部３１と第二ハウジング部４２とにより第一シール部５１を挟み込む力等により、第一シール部５１及び第二ハウジング部４２と接続パイプ３との間のシール性を確保することができる。 Further, in the above embodiment, it has been described that the seal member 5 includes the first seal portion 51 and the second seal portion 52. However, when used in an environment where the internal pressure difference inside the pipe is low or negative pressure, the seal member 5B may include only the first seal portion 51 as in the pipe joint 1B shown in FIG. In this case, the seal band becomes unnecessary. Even in such a case, due to the elastic expansion and contraction force of the seal member 5B, the force of sandwiching the first seal portion 51 between the convex portion 31 of the connecting pipe 3 and the second housing portion 42, and the like, the first seal portion 51 and the second (Ii) The sealing property between the housing portion 42 and the connecting pipe 3 can be ensured.

また、上記実施形態では、第二ハウジング部４２の内周面に凹部４５が形成され、第一シール部５１の外周面に当該凹部４５に嵌め込まれる凸部５３が形成されるものとして説明した。しかしながら、凹部は、第二ハウジング部４２の内周面又は第一シール部５１の外周面の何れか一方に形成されていればよく、当該凹部に嵌め込まれる凸部は、第二ハウジング部４２の内周面又は第一シール部５１の外周面の何れか他方に形成されていればよい。例えば、第一シール部５１の外周面に凹部が形成され、第二ハウジング部４２の内周面に当該凹部に嵌め込まれる凸部が形成されていてもよい。 Further, in the above embodiment, the recess 45 is formed on the inner peripheral surface of the second housing portion 42, and the convex portion 53 fitted into the recess 45 is formed on the outer peripheral surface of the first seal portion 51. However, the recess may be formed on either the inner peripheral surface of the second housing portion 42 or the outer peripheral surface of the first seal portion 51, and the convex portion fitted in the recess is the second housing portion 42. It may be formed on either the inner peripheral surface or the outer peripheral surface of the first seal portion 51, whichever is the other. For example, a concave portion may be formed on the outer peripheral surface of the first seal portion 51, and a convex portion to be fitted into the concave portion may be formed on the inner peripheral surface of the second housing portion 42.

また、上記実施形態では、配管継手１は、第一ハウジング部４１に樹脂チューブ２が圧入された樹脂チューブ組立体１０として構成されているものとして説明した。しかしながら、樹脂チューブ組立体１０として組み立てられる前の配管継手１のみで構成されていてもよい。この場合であっても、ハウジング４の第一ハウジング部４１に樹脂チューブ２を圧入するとともに、シール部材５に接続パイプ３を挿入することで、配管継手１により接続パイプ３と樹脂チューブ２とを接続することができる。 Further, in the above embodiment, the pipe joint 1 has been described as being configured as a resin tube assembly 10 in which the resin tube 2 is press-fitted into the first housing portion 41. However, it may be composed of only the pipe joint 1 before being assembled as the resin tube assembly 10. Even in this case, the resin tube 2 is press-fitted into the first housing portion 41 of the housing 4, and the connection pipe 3 is inserted into the seal member 5, so that the connection pipe 3 and the resin tube 2 are connected by the pipe joint 1. You can connect.

１，１Ａ，１Ｂ…配管継手、２…樹脂チューブ、３…接続パイプ、３１…凸部、３２…凸部、４…ハウジング、４１…第一ハウジング部、４２…第二ハウジング部、４３…溝、４４…段差面、４５…凹部、５，５Ｂ…シール部材、５１…第一シール部、５２…第二シール部、５３…凸部、６…シールバンド、７…Ｏリング、１０…樹脂チューブ組立体。 1,1A, 1B ... Piping joint, 2 ... Resin tube, 3 ... Connection pipe, 31 ... Convex part, 32 ... Convex part, 4 ... Housing, 41 ... First housing part, 42 ... Second housing part, 43 ... Groove , 44 ... Step surface, 45 ... Concave, 5, 5B ... Seal member, 51 ... First seal part, 52 ... Second seal part, 53 ... Convex part, 6 ... Seal band, 7 ... O-ring, 10 ... Resin tube Assembly.

Claims (5)

先端部の外周面に凸部が形成された接続パイプに樹脂チューブを接続する配管継手であって、
前記樹脂チューブが圧入されるハウジングと、
前記接続パイプが挿入されて前記接続パイプとの間をシールする弾性伸縮可能なシール部材と、
前記シール部材を締め付けるシールバンドと、を備え、
前記ハウジングは、一方端部に位置して外周面側に前記樹脂チューブが圧入される第一ハウジング部と、他方端部に位置する第二ハウジング部と、を有し、
前記シール部材は、前記第二ハウジング部の内周面側に挿入される第一シール部と、前記ハウジングから突出して前記シールバンドに締め付けられる第二シール部と、を有する、
配管継手。 A piping joint that connects a resin tube to a connection pipe having a convex portion formed on the outer peripheral surface of the tip portion.
The housing into which the resin tube is press-fitted and
An elastically stretchable sealing member into which the connecting pipe is inserted to seal between the connecting pipe and the connecting pipe.
A seal band for tightening the seal member is provided.
The housing has a first housing portion located at one end and press-fitted with the resin tube on the outer peripheral surface side, and a second housing portion located at the other end.
The seal member has a first seal portion inserted into the inner peripheral surface side of the second housing portion, and a second seal portion protruding from the housing and fastened to the seal band .
Plumbing fittings. 前記第二ハウジング部の内周面又は前記第一シール部の外周面の何れか一方には、凹部が形成されており、
前記第二ハウジング部の内周面又は前記第一シール部の外周面の何れか他方には、前記凹部に嵌め込まれる凸部が形成されている、
請求項１に記載の配管継手。 A recess is formed on either the inner peripheral surface of the second housing portion or the outer peripheral surface of the first seal portion.
A convex portion to be fitted into the concave portion is formed on either the inner peripheral surface of the second housing portion or the outer peripheral surface of the first seal portion.
The piping joint according to claim 1 . 前記ハウジングと前記シール部材とは、一体的に成形されている、
請求項１又は２に記載の配管継手。 The housing and the sealing member are integrally molded.
The piping joint according to claim 1 or 2 . 前記ハウジングと前記シール部材とは、別部材である、
請求項１又は２に記載の配管継手。 The housing and the seal member are separate members.
The piping joint according to claim 1 or 2 . 樹脂チューブと、
請求項１〜４の何れか一項に記載の配管継手と、を備え、
前記第一ハウジング部が前記樹脂チューブに圧入されている、
樹脂チューブ組立体。 With a resin tube
The piping joint according to any one of claims 1 to 4 is provided.
The first housing portion is press-fitted into the resin tube.
Resin tube assembly.
JP2017032423A 2017-02-23 2017-02-23 Piping fittings and resin tube assemblies Active JP6792483B2 (en)

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JP2017032423A JP6792483B2 (en) 2017-02-23 2017-02-23 Piping fittings and resin tube assemblies
DE112018000972.6T DE112018000972T5 (en) 2017-02-23 2018-02-07 Pipe connector and resin pipe assembly
PCT/JP2018/004235 WO2018155187A1 (en) 2017-02-23 2018-02-07 Piping joint and resin tube assembly
US16/487,805 US11262006B2 (en) 2017-02-23 2018-02-07 Piping joint and resin tube assembly
CN201880013362.0A CN110337558B (en) 2017-02-23 2018-02-07 Piping joint and resin pipe assembly

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FR508967A (en) * 1918-10-15 1920-10-28 Emile Marie Paul Amann Connection for inflating pneumatic tires
US2544764A (en) * 1947-12-31 1951-03-13 Parkes James Arnold Pump connector
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FR2702028B1 (en) * 1993-02-26 1995-05-24 Caillau Ets Spring clamp, with improved safety.
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JP2880453B2 (en) 1996-06-07 1999-04-12 三桜工業株式会社 Retainers for piping fittings
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CN110337558B (en) 2021-11-16

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